It seems that (alt-)presets are accepted by the recent versions only for backward compatibility. The developers are trying to stay away from presets, and are going back to the good old simple options like -V and -b.

With Lame4, this attitude/tendency is even more obvious. Here is the "--preset help" of lame4a11:

QUOTE

The --preset switches are obsoleted and discouraged to use.All the presets are only alias to the simple VBR/ABR/CBR mode